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Proceedings Paper

Sol-gel processing of lithium niobate thin layers for optical applications
Author(s): Dennis J. Eichorst; David A. Payne
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Paper Abstract

The sol-gel processing of lithium niobate thin-layers on silicon from heterometallic alkoxide solutions is described. Advantages of sol-gel processing for low-temperature formation of stoichiometric lithium niobate are discussed. A recyrstallization procedure, involving a bimetallic alkoxide, was developed for the purification of alkoxide solutions. The alkoxide complex contained the appropriate cation ratio for the preparation of stoichiometric lithium niobate. Solvent selection, addition of nitric acid or ammonium hydroxide, and thermal processing conditions were shown to affect the ceramic microstructures. In particular, the solvent system and additives influenced grain growth and porosity in the crystallized layers. Methoxyethanol-derived layers had a grain size approximately twice that observed for the ethanol system. Use of a rapid heating process produced dense layers at 650°C, whereas oxygen treatments allowed for crystallization at 400°C.

Paper Details

Date Published: 1 November 1990
PDF: 10 pages
Proc. SPIE 1328, Sol-Gel Optics, (1 November 1990); doi: 10.1117/12.22582
Show Author Affiliations
Dennis J. Eichorst, Univ. of Illinois/Urbana-Champaign (United States)
David A. Payne, Univ. of Illinois/Urbana-Champaign (United States)


Published in SPIE Proceedings Vol. 1328:
Sol-Gel Optics
John D. Mackenzie; Donald R. Ulrich, Editor(s)

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